There is a need to develop a better understanding of the early phase of bipolar disorder, and to develop and evaluate effective psychosocial interventions that assist people in this phase. The purpose of this study is to determine whether or not it is feasible to conduct a larger study of the effectiveness of cognitive interpersonal therapy (a psychological therapy) with individuals who have experienced their first or second treated episode of mania or hypomania (symptoms common in early development of bipolar disorders).